Variable stroke pump



- April 23, 1935. w. H. S-WARTZ ET AL VARIABLE STROKE PUMP Filed Aug;29, 1931 5 Sheets-Sheet 1 INVENTOR &0 ATTORNEY April 23, 1935. w. H.SWARTZ El Al.

VARIABLE STROKE PUMP Filed Aug. 29, 1931 5 Sheets-Sheet 2 a 4 mm [9 1ATTORNEY W gw- April 23, 1935. wjH. SWARTZ El AL 9 3 VARIABLE STROKEPUMP Filed'Aug. 29, 1951 :5 Sheets-Sheet 3 lNVENTOR BS mai ho ATTORNEYPatented Apr. 23, 1935 VARIABLE-STROKE PUMP William H; swammohmese;swartzi'y rle Par, fiassignors to General Machine 'Works,"Inc., YorkePas, a'corporation o-f'lennsylvania Application August "29; 1931 SerialNo 560,196

Theninvention -.'re1ate s to :majchines: by' meansof which grease;liquid; lpaste -granulated materials 1011 the: like areappliedor=distibuted and has:

for aitssgeneral. object P the provision of means forautomaticahytdelivering;- anyjgiven 2 quantity or grease" or other:materials as qthe: distributing means: at 1 any: regular: or irregular:intervals; vit-- in :on" its operation. the? same feeffects contro l:01":

therfeedv .orsrdistribution of the grease For other: 20 material toiqthepans or anything; elsei-rto 1 be coated; a a Afifurtherfobject :ofi atheinvention-date provide an: attaehment ohthis character; wherein there isembodied: 1 pump; means for "supeiyin'gx grease 1'01 theiikeitoaswabsnorotherngreasinggeiementspthe attachment :beingrsusceptibiebf'acwariabi'ewstroke: so that 1' a;= predeterminediiquamtity ofIlg-reaseor other:substancecmayi'beufedn. I

A stil-lsfurther object ris to' provide :an. attachie 'ment of thischaracter in which thereis=arposi tive 1 andv definite contreh means 101" regulating the zfeeddof rgrease for-the like to: the distributingmeans this --c o'ntro1 means: being moreover; oi suchiormeanduarrangement iasyto= lz ewcapable- 0thavingvapplied.thereto-igraduations or visible in. dicia whereby any:desired adjustmentssmay; be baz oughttabouteto insure thepropenrate-chfeed 0t materiaI- .te the disti 'ibutingnieans: f

, Anadditionahobiectisto provideera mechanism or. attachment ,oi thisv'ch'aracter which :wilL-be- Figure 3is awertical crosssectional viewtaken: on substantiallythedine14 4 oft-Figural. I

Figure 4 is averticaldetailrsectional view taken through one ojf.thedistributors. I

Figure: El is acfragmentary iew partlysin eievas tion and v partly, insection-V showing one of themechamcaL-features, invol vedin theinventionFigure 6 is a detaii herize tai section showing: a plan iew --of :thelever 0m tor-rendering: the: grease cfeedin-gg: mechanism temporarilyinefiemtive.

Figure 1ine-8 8 .o Figure16n- 'i is a detail cross sections takenvcn therReferringmorerparticularly towthesdrawings werhaveshown: eamaehinec-for greasingpans of any; desired; size or shape,- this, machinecompr-is ing a frame indicated. generally-b thenumerat I i! andcomp-rising *anyvnecessarys-number10f (legs ii I to whicharesecunedupper and lower; longitudt-v na11y.-: extending-angle bars 12andzul3 andi'tra-ns-i versely extending angle bars. Mand I5; the va-.ricus bars ibeing secured together innany preferred manner; Obviously(it [should 4- be'. distinctiy una derstood. that there-:is; nothings,particularly, distinctive or unusualt-about the frame astheeconstructionthereof might bev varied =within:..wide limits,- thed-isclosureebeingn-simplyr for; purposes of. i11ustrati0n-.=. Mountedwithin-v. the-' frame I 0 spaced-i t relation: and adapted to bemoved:and 7 held in adjusted position by a screw 1 1 extending throughthreaded bores in the carriages 495a Secured upon eachofilthecarriages-l9is--a *retainingrbracket structured] of angular form held inplace any: desired :manner-v as for example 26is1idab1y. mounted forislid-ing movement'within all :Of-a the brackets ZI landiadapted to bemovedlongitudinal-1y for. thepurpose ofefiectingsro-ta tion =01. the spindlesfl Located-above and in axial I relationn-to the-hollow or tubularspindles 23-.are othentubular spindles-21 eachtof which r is formed withan annular groove 2 8 the spin "dies"?! beingaconnectedWith"-thespin'd1es23 by collars:29ywhicinembrace bothi andioverlap thejoints :between; them; the'collars being secured to the. spindles; 23as-fl-by: set screws: and" being secured with respect to the spindles 21as by other set screws 3| carried by the collars 29 and engaging withinthe annular grooves 28. At its upper end, each spindle 21 is providedwith a carrier 32 having upstanding pins or the like 33 constituting agrip or clutch for holding a swab, brush or the like 34 preferably ofsomewhat tapered or conical form. The respective swabs 34 are intendedto engage within the-pans 35 to be greased or otherwise treated orcoated. Logically the swabs or brushes 34 must have interiorly locatedducts communicating with the hollow spindles 21 for the purpose ofconducting grease, oil or in fact any other desired substance into andthrough the swabs so that the material will be applied to the pans 35 inthe form of a coatmg.

Mounted at the top of the frame ['0 is a traylike casing or guard 36within which'is' a pan support 36 and having a bottom wall 31 locatedbeneath all of the brushes or swabs 34 and provided for the purpose ofpreventing the grease 'or other -material from being thrown out and ontosurrounding objects, it being a feature that any desired drain meanswhatsoever, not shown, may be provided for the purpose of conductingback into "the supply source the surplusgrease,

sired manner is a shaft 38 carrying any desired number of crank arms 39connected by a link 40 with a longitudinally'extending shaft 4| whichextends throughout the length of a longitudinally extending trough orhopper 42 adapted to contain grease, oil o'r in fact any other substanceto be applied to the pans 35 or any other analogous articles or objects.The trough or hopper 42 is carried by one or more members 43 on theupper end or ends ofone or more plungers 44 urged upwardly by a springor springs 45. Within the hopper or trough 42 each spindle 23 issurrounded by a sleeve 46 which acts as a cylinder with'the hollowspindle serving as a piston. Any suitable pump and valve means may beprovided, not shown, so that the grease or other substance will becaused to enter the cylinders 46 and pass from them into and through thespindles 23 and 21 to and through the swabs or brushes 34.

The means for controlling the feed or supply of grease or othersubstance to the pans or other objects to be treated is herein disclosedas comprising, a constantly driven shaft which might be the main shaftof the machine or which may be driven by an electric motor or in factany other type of power device. This shaft 49 carries a pinion 50meshing with an intermediate gear 5i suitably journaled and carrying apinion 52 meshing with a relatively large gear 53 suitably journaled ona bracket structure 54 mounted. at the intermediate portion of the frameIll. The gear 53 is shown as formed with a plurality of spacedprojections 55 upon a selected'one of which is secured as bya singlescrew 55a a cam (looperating'with the cam 56 is an angle lever 51pivoted intermediate its ends on a suitable bracket as shown at 58 andprovided at one end with a roller 59 adapted to be engaged periodicallyby the cam 56. The other end of the lever of the shaft 38.

51 is formed with an eye 60 having its interior of toroidal shape asclearly illustrated in Figure 7 and receiving a pin 61 projecting fromone end of a rocking lever 62 which is pivoted intermediate its ends asshown at 63 and which has its other end formed with an eye 64 slidablyengaged upon a vertically arranged rod 65 having a threaded connection66 at its upper end within a'socket 6T pivotally connected at 68 withina clevis 69 on one end of a crank arm 10 on the end The vertical rod 65carries a stop collar H against which the free end of the rocking lever62 engages, and beneath and abutting against the free end of the lever62, or against 'the eye 64 at the end thereof, is a spring l2 which inturn abuts against an additional collar l3 secured on the rod 65.Clearly, when the rocking lever 62 is oscillated about its pivot 63 thecooperation or engagement of the eye 64 with the collar 1| will causevertical reciprocatory movement of the rod 65 and socket 61 andconsequent rocking movement of the crank arm 10 and rock shaft 38, andas the latter is connected by the crank arm or arms 39 with the link orlinks 49 carrying the cylinders 46 the cylinders are moved with respectto the pistons therein for effecting the pumping action and in this waythe quantity of material fed through the hollow spindles 23 and 21 tothe swabs or brushes may be regulated.

Cooperatingwith the lower end of the vertical rod 65 is means forlimiting its downward movement, this means being here disclosed-ascomprising a quadrant l4 eccentrically" pivoted as shown at T5 andformed in its periphery with a plurality of notches 76 adjacent whichthere may be provided graduations or indicia of any sort desired forgiving the operator a clear reading as to the position and length ofmovement or travel of the rod 65 and consequently the pump stroke. Thequadrant is of course pivotally mounted and it is intended that itsposition be altered to bring about the desired results, and. forthisreason we have shown and integrally formed wing nut or hand-piece I! bymeans of which it may be quickly and easily turned without any necessityfor the employment of tools. The lower end of the rod 65 is rounded andmay be engaged within a selected one of the notches 16 in thecircumference or periphery of the eccentric quadrant 14.

Clearly, when the main shaft 49 is rotating the reducing gears 50, 5|,52 and 53 will be driven and the cam 56 will periodically engage theroller 59 and rock the angle lever 51 periodically so that the rockinglever 62 will be correspondingly rocked or moved in an oscillatorymanner upon its pivot 63 so that the eye 64 cooperating with the stopcollar H on the rod 65 will cause the latter to move vertically,resulting in rocking movement of the'crank arm llLshaft 38, and crankarm 39 for varying the stroke of the pump mechanism.

Obviously, by rotating the eccentrically mounted quadrant 14 thedistance between its pivot and the successive notches or depressions 16maybe varied so that the extent of movement of the rod 65 andconsequently the pump stroke may be varied. V

' Another important feature of the invention resides in the provision ofmeans for rendering the entire pumping mechanism ineffective temporarilyin case it is necessary for the operator to leave the machine for ashort length of time. In accomplishing this. we provide a rock shaft 8|which is vertically arranged and journaled in suitable brackets carriedby the frame, one bracket having spaced lugs indicated by the numeral82. At its upper portion this rock shaft carries a handle 83 bymeans ofwhich it may be partially turned, and at its lower portion it carries anarm 84, more clearly disclosed in Figure 6, having a. hub portion 85fitting. fairly closely between the lugs 82. This arm is adapted to berotated partially so as to interpose it between the lower end ofthevertical rod 65 and the notches in the periphery of the quadrant 14.For this reason it is preferable that the arm 84 be wedge shaped incross section as shown in Figure '7 so that when the rod 65 is in itselevated position the operator may by grasping and moving the hand lever83 partially rotate the shaft 8| to force the thin edge of the arm 84between the lower end of the vertical rod 65 and the quadrant 74 so thatthere will be nothing to move the shaft conducting a supply of grease orother substance to the swabs which operate within the pans or othercontainers. It will be noted that we have made ample provision foradjustment of the stroke or" the pump so that the quantityof materialsupplied to the swabs or other equivalent elements may be'easilycontrolled. In'addition,

a very simple adjustment has been provided whereby the rate or feed ofthe grease or other substance may be accurately set and maintained.

constant; Attention is also directed to the feature of the release levermechanism which is adapted to'cooperate with the adjusting means for thepurpose of rendering the pump mechanism entirelyinactive or ineffectivetemporarily while the operator is attendingto someadjustment .on, themachine or while he might have to leave it unattended for a few moments.It is believed from the above ,thatythe' construction, 7

operation and advantages will be readily apparent to one skilled in theart without further explanation.

While we have shown and described the preferred embodiment of theinvention, it should.

be understood that we reserve the right to make all such changes in thedetails of construction and the arrangement and combination of parts aswill not depart from the spirit of the invention or the scopeof thesubjoined claims.

Having thus described. the invention we claim:

In a pump mechanism, a constantly rotating shaft, a cam deviceoperatively driven by said shaft through reducing gearing, a levermovableby said cam device, a plungeroperatively connected with saidlever and with the pump mechanism, spring means urging said plunger inone direction, and means for limiting movement of said plunger againstthe resistance of said spring means comprising a quadrant eccentrically'pivotally mounted with its periphery inabutting engagement to theplunger, means for shifting the position of the quadrant, and meansdisposablebetween the plunger and the quadrant for maintaining theformer against movement regardless of the position of the latterconsisting of a rod equipped with an'operating handle, and t a taperedarm on said rod interposable between the end of the plunger and theperiphery of the quadrant.

WILLIAM H. SWARTZ.

CHARLES G. SWARTZ.

